public static extern bool OpenPrinter(string printer, out IntPtr handle, ref StructPrinterDefaults pDefault);
public static extern bool OpenPrinter(string printer, out IntPtr handle, ref StructPrinterDefaults pDefault);
/// <summary>
///
/// </summary>
/// <returns>
/// 0：禁用；1：正常；2：忙；3：离线；
/// 10：空闲未装载纸；11：空闲已装载纸，准备就绪
/// </returns>
public virtual int GetStatus()
{
log.Debug("begin");
if (!enabled)
{
log.DebugFormat("end, return = {0}", StatusCode.Disabled);
return(StatusCode.Disabled);
}
int result = StatusCode.Offline;
IntPtr hPrinter;
StructPrinterDefaults defaults = new StructPrinterDefaults();
if (!OpenPrinter(name, out hPrinter, ref defaults))
{
log.InfoFormat("end, return = {0}", StatusCode.Offline);
return(StatusCode.Offline);
}
uint s = 0x00001000;
int cbNeeded = 0;
bool bolRet = GetPrinter(hPrinter, 2, IntPtr.Zero, 0, out cbNeeded);
if (cbNeeded > 0)
{
IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
bolRet = GetPrinter(hPrinter, 2, pAddr, cbNeeded, out cbNeeded);
if (bolRet)
{
PrinterInfo2 Info2 = (PrinterInfo2)Marshal.PtrToStructure(pAddr, typeof(PrinterInfo2));
s = Info2.Status;
}
Marshal.FreeHGlobal(pAddr);
}
ClosePrinter(hPrinter);
log.InfoFormat("s = {0}", s);
if ((uint)PrinterStatus.PRINTER_STATUS_PAPER_OUT == (s & (uint)PrinterStatus.PRINTER_STATUS_PAPER_OUT) ||
(uint)PrinterStatus.PRINTER_STATUS_DOOR_OPEN == (s & (uint)PrinterStatus.PRINTER_STATUS_DOOR_OPEN) ||
((uint)PrinterStatus.PRINTER_STATUS_PAPER_PROBLEM == (s & (uint)PrinterStatus.PRINTER_STATUS_PAPER_PROBLEM)))
{
result = 10;
}
else if ((uint)PrinterStatus.PRINTER_STATUS_PRINTING == (s & (uint)PrinterStatus.PRINTER_STATUS_PRINTING))
{
result = 2;
}
else if (0 == s)
{
result = 11;
}
else
{
result = 3;
}
log.InfoFormat("result = {0}", result);
log.Debug("end");
return(result);
}
